KR20120013374A - Video information reproducing method and video information reproducing device - Google Patents

Abstract

SUMMARY OF THE INVENTION An object of the present invention is to provide a video information reproducing method capable of shortening a waiting time required for returning to a menu screen during resume playback of content whose playback of a video can be controlled by a program running on a virtual machine. It is done. The video information reproducing method according to the present invention is a video information reproducing method for reproducing a recording medium on which virtual machine-use content is recorded, which can be controlled by a program operating on a virtual machine. After the playback is stopped in the middle, when the instruction to resume the playback is made, a simple resume playback is performed to resume the playback of the main video without starting the program, and after the simple resume playback of the main video is finished, the program is resumed. When the playback is started from the initial state, the playback of the predetermined video played back until the menu screen is displayed is omitted.

Description

VIDEO INFORMATION REPRODUCING METHOD AND VIDEO INFORMATION REPRODUCING DEVICE}

The present invention relates to a recording medium on which content can be controlled by a program operating on a virtual machine, and a video information reproducing method and a video information reproducing apparatus for reproducing a video from the recording medium. .

There is a DVD player as a device for playing video contents such as movies and dramas.

In order to control the reproduction of a video in a DVD player, a navigation command, which is a relatively simple control language, is used. On the other hand, in the Blu-ray Disc (BD) player which is spreading recently, the Java virtual machine is employ | adopted in order to be able to watch a complex and highly interactive content (refer patent document 1). Java is a registered trademark (the same applies hereinafter).

(Prior art technical literature)

(Patent literature)

(Patent Document 1) Japanese Patent No. 3837427

The reproduction data of a DVD is composed of video data, audio data, graphic data, and video control data, and these data are superimposed on one file. In a DVD player, when playback is stopped (suspended or suspended), and then resume playback (resume playback) is performed, playback from the playback stop point after a few seconds of waiting time is performed. Is resumed. In this case, since data necessary for reproducing video data, audio data, and the like are all superimposed on one file, reproduction can be resumed from the reproduction stop position by rereading a small management information file from the disc. The waiting time until resume play is short.

However, in playback of content (Java virtual machine-enabled content) using a Java application of a Blu-ray Disc BD, when the playback is resumed after the playback is stopped, the BD is inserted into the video information reproducing apparatus. Since the playback operation is performed from the initial state, the Java application program must be restarted, and it takes several tens of seconds to several minutes until playback is resumed from the playback stop position. In order to avoid this, there is a method of shortening the time until the resumption of playback by treating the content using the Java application as the content not using the Java application. However, since the Java application must be used to display the menu screen normally, even if playback is resumed as content not using the Java virtual machine, in order to return to the menu screen, the Java application program must be restarted. do. For this reason, in the resume playback in the BD player, there is a problem that user convenience is greatly impaired.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object thereof is to provide a waiting time required for returning to a menu screen during resume playback of content whose reproduction of an image can be controlled by a program running on a virtual machine. A video information reproducing method, a video information reproducing apparatus, and a recording medium can be shortened.

The video information reproducing method according to the present invention is a video information reproducing method for reproducing a recording medium on which virtual machine-used content is recorded, which is capable of controlling playback of a video by a program operating on a virtual machine. If the instruction of resuming playback is instructed after stopping the reproduction of the main-program video, a simple resume playback for resuming playback of the main video is performed without starting the program, and the simple resume playback of the main video is performed. When the program is started and the playback from the initial state is performed after the completion, the playback of the predetermined video played back until the menu screen is displayed is omitted.

According to the video information reproducing method according to the present invention, after the simple resume playback of the main video is finished, a predetermined playback is performed until the menu screen is displayed when starting a program operating on the virtual machine to perform playback from the initial state. Since the playback of the video is skipped, the waiting time until the menu screen is displayed after the end of the simple resume playback can be shortened.

1 is a block diagram schematically showing the configuration of a video information reproducing apparatus according to an embodiment of the present invention.
2 is a diagram showing an example of a directory structure in a recording medium according to one embodiment of the present invention.
3 is a diagram illustrating an example of syntax of a plst file.
4 is a diagram illustrating an example of a relationship between a playlist and a stream file.
5 is a diagram illustrating an example of syntax of a clip file.
6 is a diagram illustrating an example of syntax of a Movie.title file.
7 is a diagram illustrating an example of the configuration of a jar file.
8 is a diagram illustrating source code of a Java application program.
9 is a diagram illustrating source code of a Java application program.
10 is a diagram illustrating source code of a Java application program.
11 is a diagram illustrating an example of a graphic image displayed by a Java application.
12 is a diagram illustrating syntax of a plst file according to a video information reproducing method according to an embodiment of the present invention.
13 is a flowchart illustrating a method of reproducing video information according to an embodiment of the present invention.
14 is an operation sequence diagram showing a video information reproduction method according to an embodiment of the present invention.
15 is a diagram illustrating a menu screen according to one embodiment of the present invention.
16 is a flowchart illustrating a method of reproducing video information according to an embodiment of the present invention.

1 is a block diagram schematically showing the configuration of a video information reproducing apparatus according to an embodiment of the present invention. The video information reproducing apparatus according to the present embodiment reproduces a recording medium on which content (virtual machine-use content) capable of controlling playback of a video by an application program operating on a virtual machine is recorded. As a disc on which such content is recorded, a DVD, CD, Blu-ray disc, etc. are assumed, but the recording medium of the content may be a nonvolatile semiconductor memory. In this embodiment, the recording medium is a Blu-ray disc (BD), and the virtual machine is a Java virtual machine.

The video information reproducing apparatus shown in FIG. 1 includes a reproducing section 10 which reproduces an optical disc 11 (BD), which is an example of a recording medium, and controls the entire apparatus and executes a Java application (a program running on a virtual machine). A CPU 21 as a reproduction control means and a nonvolatile memory 22 are provided. The drive 12 reads information from the optical disc 11 and outputs it to the demultiplexer 13. The demultiplexer 13 separates the data read by the drive 12 into video information, audio information, and caption graphic information. The video decoder 14 decodes the video information, the subtitle decoder 15 decodes the subtitle graphic information, and the audio decoder 16 decodes the audio information. The graphic superimposing unit 17 superimposes the graphic information displayed by the Java application input from the CPU 21 on the decoded video information and the subtitle graphic information. The video signal output from the graphic superimposing unit 17 is sent to the external display device 31, and the video is displayed by the external display device 31. The audio signal output from the audio decoder 16 is sent to an audio output device (not shown), and audio is output.

In the video information reproducing apparatus according to the present embodiment, when the CPU 21 stops during playback of the main video image of the content using the Java application, and resumes playback from the stop position, the CPU 21 reproduces the content without using the Java application. After the playback of the main video is finished, the Java application program required for displaying the menu screen is started. Here, in the conventional video information reproducing apparatus, since the optical disc is reproduced from the initial state, playlists such as trailers are displayed up to the menu screen display. In the video information reproducing apparatus according to the present embodiment, after starting the Java application program, the time until the menu screen display is omitted by omitting playback of a playlist such as a trailer, which is performed until the menu screen is displayed. It is characterized by shortening.

FIG. 2 is a diagram showing an example of the configuration of files and directories required for reproduction of a BD recorded on the optical disc 11. In Fig. 2, the "Movie.title" file is a file in which information necessary for controlling the title which is the highest playback unit is described. In Fig. 2, " PLST " is a PLST folder in which files describing information necessary for controlling playback of a playlist (PlayList) are stored. In the PLST folder, a plurality of plst files "xxx.plst" exist. Here, "xxx" is a three digit number. In FIG. 2, "STREAM" is a STREAM (stream) folder in which files necessary for reproduction of video information, audio information, graphic information, and the like are stored. There are a plurality of stream files "yyy.strm" in the STREAM folder. Here, "yyy" is a three digit number. The stream file is a file composed of a TS (transport stream) employed in digital broadcasting and in which video information, audio information, and graphic information having a unique packet ID are superimposed. In FIG. 2, "CLIP" is a CLIP folder in which clip files describing information necessary for controlling playback of stream files are stored. In the CLIP folder, a plurality of clip files "zzz.clip" exist. Here, "zzz" is a three digit number. The Clip file and the stream file correspond one-to-one. For example, if the clip file "123.clip" exists in the CLIP folder, the stream file "123.strm" corresponding to "123.clip" in the STREAM folder. "This exists. In FIG. 2, "JAR" is a JAR (Java Archive) folder in which an application for title playback control operating on a Java virtual machine is stored. In the JAR folder, there is a jar file "JP \ JPY.jar" which compresses a set of files necessary to execute a Java application in a ZIP format. Here, "yen" is a three-digit number.

FIG. 3 is a diagram illustrating an example of syntax of the plst file "xxx.plst" in FIG. 2. In Fig. 3, " number_of_stream " represents the total number of stream files reproduced in the playlist (PlayList). The next loop below "for" is repeated by the number of "number_of_stream". In addition, the "stream_file_name" in this loop describes the file name of the stream file to be played. In addition, "in_time" and "out_time" describe the start time and end time of the portion to be reproduced in the stream file. These times are described in PTS (Presentation Time Stamp) added to the packet of the stream file.

4 is a diagram illustrating an example of a relationship between a playlist (PlayList) and a stream file indicated by the plst file of FIG. 2. In the playback of the playlist shown in FIG. 4, the portion from "in_time" to "Out_time" of "001.strm" and the portion from "in_time" to "Out_time" of "003.strm" are sequentially played. .

FIG. 5 is a diagram illustrating an example of the syntax of the clip file "zzz.clip" of FIG. 2. In Fig. 5, the clip file describes superimposed information such as video information and audio information of a stream file paired with this, index information required for random access and the like. In "stream_info ()", attribute information of superimposed video information, audio information, and graphic information is described. However, since "stream_info ()" is not directly related to the present invention, detailed description thereof is omitted. In addition, "index_info ()" describes the time information and the position information of the head of each GOP in the stream file. "number_of_GOP" represents the total number of GOPs (Group of Pictures) included in the stream file. The next for loop is repeated as many as "number_of_GOP". "start_PTS" represents PTS information of the I picture at the head of the GOP. "relative_byte" represents the relative number of bytes from the head of the stream file to the head of the I picture.

6 is a diagram illustrating an example of syntax of a "Movie.title" file. When the optical disc 11 is inserted into the drive 12, under the control of the CPU 21, the drive 12 first reads the "Movie.title" file. In FIG. 6, "number_of_title" is the total number of titles recorded on the optical disc 11. FIG. The next for loop is a loop repeated as many as "number_of_title". "title_type" is set to "1" for title content using a Java application and "0" for title content not to use a Java application. "title_attribute" is set to "1" when the title is a title for menu screen display and "0" when it is not a title for menu screen display. In the following if statement, when "title_type" is "1", the jar file name where the Java application is stored is described. The Jar file name is, for example, "123.jar". In the following else statement, the file of the playlist to be played back is described when "title_type" is "0". The file of the playlist to be played back is, for example, "123.plst". "next_title_id" describes "title_id" to be played next after the reproduction of the title currently being played.

The CPU 21 performs processing in accordance with the title information described at the beginning based on the "Movie.title" file read out from the optical disc 11 by the drive 12. Here, when title_type = 1 and title_attribute = 0, since the title is title content using a Java application, a file (for example, 001.jar) in which the Java application to be used is read is analyzed.

FIG. 7 is a diagram illustrating an example of a configuration of "001.jar" corresponding to a jar file in the JAR folder of FIG. 2. In FIG. 7, the "001.jar" file is comprised of three files, "test_img.png", "test.class", and "test $ timer.class". "test_img.png" is a file in which image data used in this application is compressed in PNG format. "test.class" and "test $ timer.class" are executable files compiled with a Java application program in an executable form.

The operation of "test.class" and "test $ timer.class" will be described below using the source code before compilation.

8 to 10 show a series of source codes before compilation of "test.class" and "test $ timer.class". The operation of the video information reproducing apparatus based on the source code shown in FIGS. 8 to 10 will be described below.

The T1 portion of the source code shown in FIG. 8 is a portion for importing a package required for executing the application. "org.disc.net.DiscLocator" is a unique package of this embodiment prepared for playlist playback because Java does not support playlist playback. The T2 portion of the source code of FIG. 8 is a portion declaring a variable. I_POS [] [] The following description shows coordinate information of image data "test_img.png" displayed using a Java application. 11 is a diagram illustrating an example of an image displayed using a Java application. FIG. 11A is a schematic diagram of an image displayed by "test_img.png", and (Xn, Yn) represents coordinate values on a memory. Here, the coordinate information of {0, 0, 128, 128} in I_POS [] [] shown in the T2 portion of the source code shown in FIG. 8 is represented by (X0, Y0) = (0, 0). Means to cut out and display a portion of a square whose coordinates are represented by (X1, Y1) = (128, 128) as vertices (two vertices existing on a diagonal line). That is, the image of "1" in FIG. 11A is displayed. In addition, the display form (FIG. 11 (b)) of the image shown to FIG. 11 (a) is mentioned later.

The T3 part of the source code shown in FIG. 9 is a part which reads "test_img.png" and decodes a PNG file. After the decoding is completed, the processing proceeds to the processing of the T4 portion of the source code. The parts T4 to T6 are parts for executing playback of a playlist (PlayList) such as a trailer, which is played until the menu screen is displayed. Here, "iPlayListID" is the file name of the playlist to be played, and "iPlayListID" is described as "0" in the T4 portion, so that playlist playback with the file name "000.plst" is executed. Similarly, since "iPlayListID = 1" is described in the T5 part, playback of the playlist of "001.plst" is executed, and "002.plst" is played because it is described as "iPlayListID = 2" in the T6 part. The list is played. In each portion of T4 to T6, when playback of the playlist is instructed, the drive 12 reads the data of the corresponding playlist from the optical disc 11. The read data is separated into video information, audio information and subtitle graphic information by the demultiplexer 13, the video information by the video decoder 14, the audio information by the audio decoder 16, and the subtitle graphic information. Are decoded by the caption decoder 15, respectively.

Here, the operation of the CPU 21 when the playback control of the playlist "000.plst" is performed by executing the processing of the T4 portion will be described. FIG. 14 is a diagram showing a sequence of communication of control information of the playlist control unit in the CPU 21 and the Java control unit controlling the Java application in the case of controlling playlist reproduction by the Java application. When the reproduction of the playlist "000.plst" is started, the Java control unit checks the reproduction time of the playlist "000.plst" every fixed time with respect to the playlist control unit. During playlist playback, the playlist playback section notifies the current playback time of the playlist in response to a request for confirmation from the Java control section. If the playback time of the playlist notified from the playlist control unit matches the final time of the playlist "000.plst", the Java control unit recognizes that the playback of the playlist "000.plst" has been completed, and processes the next T5 part. And play the playlist "001.plst" in the same sequence.

The T7 portion is source code that executes the processing for displaying the menu screen after executing the processing of the T4 to T6 portions (after displaying a playlist such as a trailer). The detailed description of the source code of the T7 part is omitted because it is not related to the nature of the invention according to the present application. Fig. 15 is a diagram showing a menu screen displayed by executing a process of the T7 portion. The menu screen shown in FIG. 15 is provided with three selectable buttons, and three main body videos can be selected and reproduced. In the present embodiment, the operation when the leftmost "main part 1" is selected will be described.

Fig. 10 is a diagram showing the source code for executing playback of the playlist constituting the first story. If the button of " Main Part 1 " in the menu screen is selected, processing of the source code of the T8 portion shown in Fig. 10 is executed. The source code of the T8 portion displays the graphic image of the Java application shown in Fig. 11A while playing the playlist "003.plst". Specifically, the image of "1" to "30" shown in FIG. 11 (a) is superimposed on the playlist video designated by "003.plst", and as shown in FIG. 11 (b), for example, 1 Displayed every second. At this time, the graphic screens "1" to "30" generated by the CPU 21, the output screen of the video decoder 14, and the output screen of the subtitle decoder 15 are formed by the graphic superimposing unit 17. The image signals of the superimposed and superimposed images are output to the external display device 21.

As described above, by using the Java application, it is possible to reproduce a complex video such as displaying various graphic images simultaneously on the main video. Here, the Java application program is described so as to decode the PNG file used for displaying the graphic image in the T3 portion before starting the reproduction. This is because decode processing of PNG data and JPEG data is very heavy on a CPU which is a device specialized for playback. When decoding is performed while executing a Java application program, graphic display cannot be performed smoothly. For this reason, after the user instructs playback start, decoding of a PNG file or the like is completed, and a waiting time of several tens of seconds to several minutes occurs until the reproduced video is actually displayed.

Here, a description will be given of the problem caused when the reproduction of the content using the Java application is interrupted and resume playback is performed. For example, when playback is interrupted at the time when "15" in FIG. 11A is displayed, in order to resume playback from the time when "15" is displayed, the CPU 21 at the time when "15" is displayed. It is necessary to hold both the state and the information of the external memory (RAM) of the CPU 21 in a nonvolatile memory such as a flash memory. However, such a configuration cannot be adopted in the consumer device composed of the minimum hardware apparatus for realizing the video reproduction function. Therefore, in the case of resume playback using a Java application, playback is started from the beginning of the playlist (the display screen of "1") after executing the processing of the parts T1 to T3 again, which greatly increases the user's convenience. Damaged.

In order to solve the above problem, in the video information reproducing apparatus according to the present embodiment, a simple resume playback is performed in which the playback is resumed as a playlist not using the Java application without operating the Java application. As a result, playback can be resumed quickly. In this case, since the Java application does not operate, graphics of "1" to "30" are not displayed, but video and audio are reproduced. In general, commercially available movie software has some functions. However, even if the Java application is not running, video, audio, and subtitles can be displayed, and the contents of the contents can be sufficiently understood.

When the reproduction of the main video is completed by the simple resume playback, a process of returning to the menu screen shown in FIG. 15 is performed. However, to display the menu screen normally, it is necessary to run the Java application. For this reason, in order to display a menu screen, the process shown to T1-T3 part is performed again, and a reproduction | regeneration operation | movement is performed from the initial state immediately after inserting the optical disc 11 into the video information reproducing apparatus. In this case, three playlists such as "000.plst", "001.plst", and "002.plst", which are played back up to the menu screen display and up to the menu screen display, are played again. The play time of such a playlist is short for 2 to 3 minutes and for longer than 10 minutes for an optical disc. Therefore, when the simple resume playback is performed, there is a problem that the user waits for several minutes, in some cases more than 10 minutes, after the playback of the main story is completed after the resume playback.

Hereinafter, in the video information reproducing apparatus according to the present embodiment, after the reproduction of the main video by the simple resume playback is completed, the reproduction operation until the Java application is started to display the menu screen will be described. FIG. 13 is a flowchart of playback control performed to skip playback of a playlist such as a trailer to be played back after starting a simple resume playback and starting up a Java application until a menu screen is displayed. When the processing from the T1 to the T3 part (starting process of the Java application) is completed, and the playback instruction of the playlist "000.plst" is given to the playlist control part in the T4 part (step S1), the CPU 21 In step S2, it is determined whether or not playback is performed after the simple resume playback in which the Java application program is not operated. In step S2, when it is judged that the playback is not after the simple resume playback, playback of the playlist "000. plst" is performed as usual (step S3). On the other hand, if it is determined that the playback is after the simple resume playback, the flow proceeds to step S4 to receive an inquiry about the current playback time sent from the Java control unit in the CPU 21. The playlist control unit in the CPU 21 notifies the Java control unit of the current playback time if it is, but is described in "Out_time" in "001.plst" in order to omit playback of "000.plst". The Java control unit is notified of the completed reproduction end time (step S5). Since the Java control unit is notified from the playlist control unit of time information of "Out_time" indicating the reproduction end time, the T5 part recognizes that the reproduction of "000.plst" is completed and plays the next playlist "001.plst". Proceed to processing source code.

Since the processing of the T5 portion is to play the playlist "001.mpls", the process proceeds from step S6 to step S7, and a playback instruction of the playlist "001.mpls" is issued from the Java control unit (step S7). Subsequently, the playback end time "Out_time" of the playlist "001.plst" is notified in step S5 to the inquiry of the reproduction time from the Java control unit in step S4 to thereby play back the playlist "001.mpls". Omit. Similarly to the processing of the T6 portion to be performed next, by notifying the reproduction end time "Out_time" of the playlist "002.plst", the reproduction of the playlist is omitted and the processing proceeds to the T7 portion. Since the processing of the T7 portion is to display the menu screen, the flow advances to step S8 to display the menu screen shown in FIG.

As described above, each playlist to be played back from the Java control unit when the playback processing of the playlist such as the trailer played back to the menu screen display is executed after simple resume playback without operating the Java application program. By notifying the reproduction end time " Out_time " in response to the inquiry of the reproduction time, the waiting time until the menu screen display can be shortened.

Fig. 12 is a play improved in order to omit playback of a specific playlist among playlists reproduced up to menu screen display after completion of playback of the main video by simple resume playback in the video information reproducing apparatus according to the present embodiment. The syntax of the list. The difference from the playlist shown in FIG. 3 is that "menu_flag" is added. "menu.flag" is a flag for identifying playlists that can be skipped after the simple resume playback, or which can be skipped after the Java application program is started up to the menu screen display. . This " menu.flag " is set to " 0 " for playlists which can be omitted from playback, and set to " 1 " for playlists that should not be omitted.

Fig. 16 is a flowchart showing the reproduction operation up to the display of the menu screen when simple resume reproduction is performed on the playlist to which "menu_flag" is added. In step S6, when playback of the playlist is instructed from the Java control unit to the playlist control unit, the CPU 21 checks the value of "menu_flag" (step S7). If " menu_flag " = 0, the flow advances to step S3 to inquire the current reproduction time sent from the Java control unit. The playlist control unit notifies the Java control unit of "Out_time" indicating the reproduction end time of the playlist currently being played (step S6). If it is determined in step S7 that "menu_flag" = 1, it is determined that the playlist is a menu screen to be played back, and in step S8, playlist playback for menu screen display is performed.

As described above, by adding "menu_flag" in the syntax of the playlist to identify the playlist whose playlist is to be reproduced up to the menu screen display after the Java application program is started, the playlist can be omitted. The playback can be omitted only for a specific playlist that can skip playback.

10: playback unit
11: optical disc (recording medium)
12: drive
13: demultiplexer
14: video decoder
15: subtitle decoder
16: audio decoder
17: graphic overlay
21: CPU (playback control means)
22: nonvolatile memory
31: external display device

Claims (6)

A video information reproducing method of reproducing a recording medium on which virtual machine-useable content is recorded, capable of controlling playback of a video by a program operating on a virtual machine,
A simple resume playback that resumes playback of the main video without restarting the program when an instruction to resume playback after stopping playback of the main-program video of the virtual machine-used content is performed. Then,
After the simple resume playback of the main video is ended, when the program is started and the playback from the initial state is performed, playback of the predetermined video played back until the menu screen is displayed is omitted.
The video information reproduction method characterized in that.
The method of claim 1,
The playlist file specifying a predetermined video to be played until the menu screen is displayed is a video that can be skipped when starting the program and playing back from the initial state after the simple resume playback. And a flag for identifying, wherein reproduction of the predetermined video is omitted based on the flag.
The method of claim 1,
After the simple resume playback, when starting the program and performing playback from an initial state, by notifying the playback control means of the time information indicating the end point of playback of the predetermined video to be played until the menu screen is displayed, And reproducing the predetermined video.
A video information reproducing apparatus having reproducing means for reproducing a recording medium on which virtual machine-used content capable of controlling reproduction of a video by a program operating on a virtual machine is recorded, the apparatus comprising:
Means for performing a simple resume playback for resuming the playback of the main video without restarting the program when an instruction to resume the playback is made after the playback of the main video of the virtual machine-used content is stopped in the middle;
Means for omitting playback of a predetermined video played back until a menu screen is displayed when starting the program and performing playback from an initial state after the simple resume playback of the main video is finished;
And a video information reproducing apparatus.
The method of claim 4, wherein
The playlist file specifying a predetermined video to be played until the menu screen is displayed is a video that can be skipped when starting the program and playing back from the initial state after the simple resume playback. And a flag for identifying, wherein reproduction of the predetermined video is omitted based on the flag.
The method of claim 4, wherein
After the simple resume playback, when starting the program and performing playback from an initial state, by notifying the playback control means of the time information indicating the end point of playback of the predetermined video to be played until the menu screen is displayed, And reproducing the predetermined video.

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